CN217925784U

CN217925784U - Special sleeve pipe trompil drill bit of radial drilling

Info

Publication number: CN217925784U
Application number: CN202222269806.3U
Authority: CN
Inventors: 杨兵; 杜军山; 刘宽; 李涪芳
Original assignee: Sichuan Ruidu Petroleum Engineering Technology Service Co ltd
Current assignee: Sichuan Ruidu Petroleum Engineering Technology Service Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-29
Anticipated expiration: 2032-08-26

Abstract

The utility model provides a special sleeve tapping drill bit for radial drilling, which comprises a connecting rod part and a drill bit which are connected in sequence; the drill bit is conical, and a plurality of circles of outer gear rings are sequentially arranged on the conical surface from head to tail; the multiple circles of outer gear rings are arranged alternately, and are respectively provided with a plurality of corresponding drill teeth; the stress surfaces of the drill teeth between the adjacent outer ring teeth are opposite, namely one is clockwise, and the other is anticlockwise; and a tip disposed at the tip of the drill bit. The utility model has the advantages that: the drilling efficiency is high, the service life is long, and the drilling tool is suitable for drilling of the casing.

Description

Special sleeve pipe trompil drill bit of radial drilling

Technical Field

The utility model relates to a trompil drill bit technical field, concretely relates to special sleeve pipe trompil drill bit of radial drilling.

Background

The existing casing windowing type radial drilling technology has preliminarily realized the improvement of the recovery ratio of an oil well, wherein casing windowing sidetrack is a key step for realizing radial drilling. But the lack of a special casing hole drilling bit is usually replaced by a conventional drilling bit, but the bit size is large, so that the casing hole is large, the drilling fluid is needed to flush the hole containing nozzles, and the equipment is large in power consumption, large in operation amount and high in cost. In the specification of a contrast document ' CN201520094021.4 special radial drilling casing tube hole-opening drill bit ', the reference ' comprises a drill bit body and a connector connected with the rear end of the drill bit body, wherein a plurality of cutting edges are distributed at intervals along the circumferential direction of the drill bit body, the front ends of the cutting edges are converged to form a sharp-angled structure, and a chip discharge groove is formed between every two adjacent cutting edges; each cutting edge is provided with a pressure relief groove. The three cutting edges are arranged, although the file comparison drill bit can rapidly drill holes in the pre-drilling stage, the subsequent drilling process is long, the cutting edges are easily abraded, and only the whole drill bit can be replaced after abrasion.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a special sleeve pipe trompil drill bit of radial drilling, it has to bore gets efficient, life is high, be applicable to the sheathed tube beneficial effect of drilling.

The purpose of the utility model is realized through the following technical scheme: a special sleeve tapping drill bit for radial drilling comprises a connecting rod part and a drill bit which are sequentially connected;

the drill bit is conical, and a plurality of circles of outer gear rings are sequentially arranged at the conical surface from head to tail;

the multiple circles of outer gear rings are arranged at intervals, and are respectively provided with a plurality of corresponding drilling teeth;

the stress surfaces of the drill teeth between the adjacent outer ring teeth are opposite, namely one is clockwise and the other is anticlockwise.

Furthermore, the device also comprises a plurality of groups of chip grooves; the chip grooves are spirally distributed on the conical surface of the drill bit; and the spiral direction of the chip groove is consistent with the normal working and rotating direction of the drill bit. Is beneficial to chip removal.

Preferably, the plurality of sets of flutes are located on the tapered surface of the drill bit between adjacent outer gear rings.

Further, the device also comprises a tip; the tip is fixed at the top end of the drill bit; the tip is circumferentially provided with a plurality of groups of front cutting toughness. The function of preliminary drilling of small holes is achieved.

The tip is preferably designed: the center of the tip is provided with a guide block and a top column which are integrally formed; the guide block is conical, and the top of the guide block is provided with an integrated top column; the front cutting edge is tough and is distributed on the periphery of the guide block and the top column; the guide block is fixed at the end of the drill bit.

Furthermore, the multi-circle outer gear ring sequentially comprises a fourth outer gear ring, a third outer gear ring, a second outer gear ring and a first outer gear ring from the top end to the tail end of the drill bit, and the fourth outer gear ring, the third outer gear ring, the second outer gear ring and the first outer gear ring are integrated with the drill bit; the outer gear ring is provided with a drilling tooth groove, and drilling teeth are welded in the drilling tooth groove.

The preferable design is carried out on the multi-ring outer gear ring and the drilling teeth: the drilling teeth on the fourth outer gear ring, the third outer gear ring, the second outer gear ring and the first outer gear ring are small teeth, large teeth, small teeth and large teeth in sequence; the big teeth are clockwise teeth which are consistent with the working direction of the drill bit; the small teeth are counter-clockwise teeth which are opposite to the working direction of the drill bit.

The outer contour formed between the large teeth is used as a reference cone, and the small teeth are recessed in the reference cone. The large teeth mainly play a role in drilling, and the small teeth mainly play a role in flattening sundry chips.

Furthermore, the connecting rod part is in a stepped shaft shape with the diameter gradually reduced for the front connecting section, the middle connecting section and the threaded rod section, and the threaded rod section is provided with an external thread. The connection strength is increased.

It should be noted that the scheme is mainly to drill the casing for well drilling along the radial direction, so that a branch well drilling is formed on the main well drilling way, and therefore, the traditional roller bit is not needed, and only the strength of the corresponding bit is suitable for the casing.

In the scheme, the drill bit is improved on the basis of a common radial drill bit: firstly, drilling a small hole through the tip end, and positioning to avoid slipping during radial drilling (the drilling of the casing is different from the drilling of a soil layer in the well); then, reaming is carried out through a drill bit, so that the purpose of fast drilling is achieved; during the drilling process of the drill bit, the large teeth mainly play a cutting role, the small teeth outwards apply pressure to the sundries discharged from the chip grooves to be flat, and the situation that the rear large teeth are broken and damaged when being contacted with the splashed sundries is avoided (the service life of the large teeth can be influenced because countless small particles do not hit the large teeth greatly, the small teeth avoid a large amount of splashed sundries, and the abrasion of the small teeth is caused when the sundries contact with the small teeth, and the normal drilling work of the drill bit is not influenced).

The utility model has the advantages of it is following:

(1) Through the two-section design of the tip and the drill bit, the quick positioning on the casing is facilitated, the subsequent quick drilling is facilitated, and the drilling efficiency is improved;

(2) The service life of the large teeth is prolonged through the design of the large teeth and the small teeth, and the normal work of the drill bit is not influenced even if the lower teeth are damaged;

(3) The drilling teeth arranged on the drilling tooth grooves of the four groups of gear rings on the drill bit facilitate rotary drilling of edge areas when holes are rotated, accelerated drilling is facilitated, the drill bit is not only dense and thick, but also durable, the efficiency of integral hole opening is improved, the drill bit is more efficient and sharp in use, the drilling teeth arranged on the outer side of the gear rings can be independently replaced, and the drilling teeth can be independently replaced after the drilling teeth are damaged.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a schematic view of a drill bit and connecting rod portion according to an embodiment of the present invention;

fig. 3 is a schematic view of the drill tooth slot according to the embodiment of the present invention;

fig. 4 is a schematic view of the installation of the drill teeth according to the embodiment of the present invention.

In the figure: 1. a connecting rod part; 10. an external thread; 11. a middle connecting section; 12. a front connection section; 2. a drill bit; 20. a fixed seat; 21. a first outer ring gear; 22. a second outer gear ring; 23. a third outer ring gear; 24. a fourth outer ring gear; 25. drilling a tooth socket; 26. drilling teeth; 27. a chip groove; 3. a tip; 30. front cutting and toughening, 31, top column; 32. and a guide block.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 to 4, a radial drilling special casing tapping drill bit comprises a connecting rod part 1 and a drill bit 2 which are connected in sequence; wherein, the drill bit 2 is conical, and a plurality of circles of outer gear rings are sequentially arranged at the conical surface from head to tail; the multiple circles of outer gear rings are arranged alternately, and are respectively provided with a plurality of corresponding drill teeth 26; in addition, the force-bearing surfaces of the drill teeth 26 between adjacent outer ring teeth are opposite, i.e., one is clockwise and one is counterclockwise.

It should be noted that the stress surfaces of the drill teeth 26 between adjacent outer ring teeth are clockwise, and the other is not clockwise. One of the scheme is clockwise, the other scheme is anticlockwise, and the other scheme is designed in other directions and still stays in the protection range of the scheme.

In this embodiment, the special casing trepanning drill bit for radial drilling further includes a plurality of sets of chip grooves 27. The chip grooves 27 are spirally distributed on the conical surface of the drill bit 2; and the spiral direction of the chip grooves 27 is consistent with the normal working and rotating direction of the drill bit 2. Is beneficial to chip removal.

Further, a plurality of sets of flutes 27 are located on the tapered surface of the drill bit 2 between respectively adjacent outer gear rings.

In this embodiment, the special casing tapping drill bit for radial drilling further comprises a tip 3. The tip 3 is fixed at the top end of the drill bit 2; there are several sets of forward cutting ribs 30 in the circumferential direction of the tip 3. The function of preliminarily drilling small holes is achieved.

Further, the center of the tip 3 is a guide block 32 and a top column 31 which are integrally formed; the guide block 32 is tapered, and the top of the guide block is provided with an integrated top column 31; the front cutting edge 30 is distributed around the guide block 32 and the top column 31; the guide block 32 is fixed at the tip of the drill bit 2.

It should be noted that, the guide block 32 is a conical structure, the arc-shaped side surface of the guide block 32 is welded with the bottom of the top pillar 31, and is attached to the discharge opening of the junk slot 27 at the bottom edge of the guide block 32, the front end of the top pillar 31 is an eccentric drill bit, which is convenient to fix before drilling, and then the front cutting toughness 30 is used for drilling the beginning of the well in a rotating manner, the arranged guide block 32 reduces the torque of the front cutting toughness 30, and plays a role in protecting the front cutting toughness 30, and the side surface of the guide block 32 can convey the fragments into the junk slot 27.

During the use, the 31 end of fore-set adopts eccentric structure, it is sunken to form in the position, later be favorable to before cutting tough 30 and process, and the guide piece 32 of inside setting plays the clastic effect of guide, can reduce the moment of torsion of cutting tough 30 bottom before simultaneously, cut tough 30's effect before playing the protection, the ring gear that sets up on the below drill bit 2 plays the effect of enlarging the aperture, the effect that the brill tooth 26 of different angles just can form drilling, and the piece that can't throw away can discharge the top through the chip groove, carry the drilling position.

In this embodiment, the connection rod portion 1 is a stepped shaft shape with a gradually decreasing diameter formed by the front connection section 12, the middle connection section 11, and the threaded rod section is provided with an external thread 10.

It should be noted that the centers of the connecting rod portion 1, the drill 2 and the tip 3 are all located on the same axis, and the connecting rod portion 1, the drill 2 and the tip 3 are all centrosymmetric about the axis.

Alternatively, as shown in fig. 4, a radial drilling dedicated casing hole bit is designed for the drill bit 2.

Specifically, on the conical surface of the drill 2, from the top end to the tail end of the drill 2, the multiple circles of outer gear rings are the fourth outer gear ring 24, the third outer gear ring 23, the second outer gear ring 22 and the first outer gear ring 21 in sequence, and the four circles of outer gear rings are integrated with the drill 2. Furthermore, the external gear ring is provided with drill tooth grooves 25, and drill teeth 26 are welded in the drill tooth grooves 25.

In the embodiment, the drill teeth 26 on the fourth external gear ring 24, the third external gear ring 23, the second external gear ring 22 and the first external gear ring 21 are small teeth, large teeth, small teeth and large teeth in sequence; the big teeth are clockwise teeth which are consistent with the working direction of the drill bit 2; the small teeth are counter-clockwise teeth which are opposite to the working direction of the drill bit 2.

The outer contour formed between the large teeth is used as a reference cone, and the small teeth are recessed in the reference cone. The big teeth mainly play a role in drilling, and the small teeth mainly play a role in leveling sundry chips.

It should be noted that the drill bit 2 is of a cone structure made of cast iron, the drill teeth 26 mounted on the four gear rings arranged on the drill bit 2 are mounted to form different angles, the drill teeth 26 mounted on the four gear rings are different in size, so that the edge area can be conveniently drilled in a rotary mode when holes are drilled, accelerated drilling is facilitated, the drill bit is dense, thick and durable, the overall hole opening efficiency is improved, the use is more efficient and sharp, and meanwhile the four gear rings and the chip grooves 27 are hinged to form a discharge hole.

The above examples only represent preferred embodiments, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention.

Claims

1. A special sleeve tapping drill bit for radial drilling comprises a connecting rod part (1) and a drill bit (2) which are connected in sequence, and is characterized in that,

the drill bit (2) is conical, and a plurality of circles of outer gear rings are sequentially arranged at the conical surface from head to tail;

the multiple circles of outer gear rings are arranged alternately, and are respectively provided with a plurality of corresponding drill teeth (26);

the stress surfaces of the drill teeth (26) between the adjacent outer ring teeth are opposite, namely one is clockwise and the other is anticlockwise.

2. The radial well drilling dedicated casing hole opening drill bit according to claim 1, characterized by further comprising a plurality of sets of junk slots (27);

the chip grooves (27) are spirally distributed on the conical surface of the drill bit (2);

the spiral direction of the chip groove (27) is consistent with the normal working and rotating direction of the drill bit (2).

3. A radial well drilling dedicated casing tapping drill bit as claimed in claim 2, characterized in that said plurality of sets of junk slots (27) are located on the conical surface of the drill bit (2) between respectively adjacent outer toothed rings.

4. A radial drilling dedicated casing hole opening drill bit according to claim 1 or 2, characterized by further comprising a tip (3);

the tip (3) is fixed at the top end of the drill bit (2);

the tip (3) is provided with a plurality of groups of front cutting toughness (30) in the circumferential direction.

5. The special casing tapping drill bit for radial drilling according to claim 4, characterized in that the center of the tip (3) is provided with a guide block (32) and a top column (31) which are integrally formed;

the guide block (32) is conical, and the top of the guide block is provided with an integrated top column (31);

the front cutting edge (30) is distributed around the guide block (32) and the top column (31);

the guide block (32) is fixed at the end of the drill bit (2).

6. The special casing tapping drill bit for radial drilling according to claim 1 or 2, characterized in that the multiple circles of outer gear rings are a fourth outer gear ring (24), a third outer gear ring (23), a second outer gear ring (22) and a first outer gear ring (21) in sequence from the top end to the tail end of the drill bit (2), and the four outer gear rings are integrated with the drill bit (2);

the outer gear ring is provided with a drilling tooth groove (25), and drilling teeth (26) are welded in the drilling tooth groove (25).

7. The special casing tapping drill bit for radial drilling according to claim 6, wherein the fourth external gear ring (24), the third external gear ring (23), the second external gear ring (22) and the first external gear ring (21) are provided with drilling teeth (26) which are small teeth, large teeth, small teeth and large teeth in sequence;

the big teeth are clockwise teeth which are consistent with the working direction of the drill bit (2);

the small teeth are counterclockwise teeth opposite to the working direction of the drill bit (2).

8. The special casing pipe open-hole drill bit of radial drilling according to claim 1 or 2, characterized in that the connecting rod part (1) is in the shape of a stepped shaft with gradually reduced diameter formed by the front connecting section (12), the middle connecting section (11) and the threaded rod section, and the threaded rod section is provided with an external thread (10).